core and chill for casting journal boxes



(No Model.)

2 Sheets-Sheet I. T.

STING JOURNAL BOXES Patented Sept 24 1895.

(No Model.) 2 Sheets-Sheet 2.

S. WATT. I GORE AND CHILL FOR CASTING JOURNAL BOXES. No. 546,948.Patented Sept. 24, 1895.

lmmml W lllllll QMLMMW UNITED STATES STEWART WATT, OF BARNESVILLE, OHIO,ASSIGNOR TO THE WATT MINING GAR WHEEL COMPANY, OF SAME PLACE.

CORE AND CHILL FOR CASTING JOURNAL-BOXES.

SPECIFICATION forming part of Letters latent No. 546,948, datedSeptember 24, 1895.

Application flied November 28 1894. Serial No. 530,268: (No model) ToaZZ whom it may concern.-

Be it known that I, STEWART WATT, of Barnesville, in the county ofBelmont and State of Ohio, have invented certain new and usefulImprovements in Cores and Chills for Casting Journal Boxes or Bearings;and I do hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form part of thisspecification.

This invention relates to cores and chills for casting journal boxes orbearings, and its object is to provide cores and chills which when used,as hereinafter described, will produce a box chilled on its bearingsurfaces and more durable than those heretofore constructed. The chillthat hardens the upper part of the journal hearing or bore in the boxextends through the bore and is made a part of the bore-core, the underpart of the chill being preferably dovetailed, so that it may befastened to the sand part of the core before the core is dried. When thecore is dry, the chill forms part thereof and the complete core can bereadily handled as one piece. The bore in the box is preferably a littleoblong in crosssection to make the axle or bearing fit loosely thereinand not touch the lower part of box. Ordinarily, in makingacasting witha straight chilled bore it is very difficult to get the chill out of thecasting after it is made; but as my chill is only a part of the corewhen the casting is made the sand in the core comes out, and the chill,notLbeing the full half-circle, drops down and is easily removed,leaving a straight smooth bore chilled on its bearingsurface for thejournal to work in. The axlejournal being smaller than thejournal-bearing in the box does not bind on the chilled part of the box.I also propose to chill the ends of the box at and above the ends of thebore to harden the box to prevent it from wearing and to make itsmoother than it would be if simply cast in the sand. To do this, I useend chills, which are separate from the core-chill; but when the core isplaced in position in the molds the end chills are set on the ends ofthe core-chill, as shown. These end chills are also very useful, becausea molder can do almost twice the amount of work using them as by theordinary method, and do it much more perfectly. They also serve asanchors for the main core.

The invention therefore is summarized in the claims, and described indetail as follows, viz:

Referring to the accompanying drawings, Figure l is a longitudinalsection view through a mold ready for casting a box. Fig. 2 is atransverse section through the same. Fig. 3 is a detail perspective Viewof the pattern. Fig. 4 is a view of the core detached. Fig. 5 is a viewof one of the end chills detached. Fig. 6 is a perspective view of thecompleted chilled box. Fig. 7 is a detail section of a doublechill-core.

Referring to the drawings, A designates the nowel in which the cavity ofthe mold is produced by the pattern P, which corresponds in exteriorcontour to the journal-box E, but has enlargements p on its ends, whichproduce recesses A in the mold-cavity to receive and support the ends ofcore 0 and also the end chills D. The core 0 is as large in diameter orslightly larger than the journal opening or hearing in the box and islonger than the hearing, so that its ends or core-prints resting in thebottoms of recesses A suspend the core in position to make thejournal-bearing through the box. The core consists of a top metal chillc, which is less than half the circumference of the core, but extendsthe entire length thereof and is longitudinally dovetailed on its underside, as at c',so that when the sand portion 0 of the core is moldedonto the chill the sand and chill are securely interlocked.

The end chills D D are metal blocks concave on their bottoms to fit uponthe ends of 0 the core 0 and fill the remaining portion of recesses A,as shown.

The complete journal-box E has a substantially flat upper surfacesurrounded on three sides with a shallow flange E and has a centraldepression E through which is a hole E Below the fiat upper portion isthe bore orjonrnal-bearin g e, formed by the core 0 in casting. The mainbody of the box is of ordinary castiron, but the part 6' thereof,(indicated by me shading,) forming the top of opening 6 and ex tendingthrough the length of said opening, is

hardened by contact with the chill cin casting, and the portions 6(indicated by shading) are also rendered very hard by contact with thechills D. It is not necessary to have the bore e oblong in section; butfor a coal-car-axle journal-bearing I prefer it so. The bore, however,may be made round and chilled both top and bottom by using two chills 0.After the casting is made the sand part of core easily comes out andlets the chill part drop down to be taken out, leaving a straight smoothchilled hole for the axle orjournal to work in. When the pattern isdrawn and the mold is ready for the core, the main core is put in themold and the chills D placed in the mold on the end of the core 0, asshown. The small core d, that projects from the center of the main chillC, will form the oil-hole E The usual way is to drill the oil-hole; butto use the core (1 is much cheaper and just as good.

The top bearing of my box being chilled a hole could not be drilledeconomically.

In making a box or bearing for a journal to work in it is almostimpossible to make the bore smooth enough on an ordinary core made ofsand, and ordinarily after it is cast it is dressed out in a lathe orboring-machine. This is expensive. Besides, in order that it may bebored it must be made of soft metal, so that when it is finished it istoo soft to be durable and soon cuts, causing additional expense andmuch inconvenience.

My chilled box or bearing requires no milling of bore, will last a greatdeal longer and is much cheaper than one made in the ordinary way, andthe journal will run smoother than on one made on a core or bored out.

In molding my box or bearing no extra pattern is required, as theordinary pattern is all that is necessary, and any flask that can beused to make an ordinary box can be used for mine, there being no extraexpense for pattern or flask.

Having thus described my invention, what I therefore claim as new, anddesire to secure by Letters Patent thereon, is- I 1. The hereindescribed core for the purpose specified consisting of the chill portion0 rounded on its outer face and dove-tailed on its other face, and thesand portion secured to the dove-tailed face of the chill, and forming acomplete cylinder therewith, substantially as set forth.

2. The herein described core for the purpose specified consisting of thechill portion 0 rounded on its outer face and dove-tailed on its innerface, and the sand portion secured to the dove-tailed face of the chill,and forming a complete cylinder therewith, in combination with themetallic end chills D fitted on the ends of the chill c, allsubstantially as and for the purpose described.

3. The herein described core for the purpose specified consisting of thechill portion a rounded on its outer face and dove-tailed on its innerface, and the sand portion secured to the dove-tailed face of the chill,and forming a complete cylinder therewith, in combination with themetallic end chills D fitted on the ends of the chill c, and the core (1on top of core 0, all substantially as described.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

STEXVART IVATT.

Witnesses:

G. H. KEMP, J. HOWARD.

